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INTRODUCTION AND SUMMARY Introduction TJKM completed a calibrated traffic-forecasting model for the City of San Leandro in conjunction with the Westgate Parkway Project in December 2004. This model is based upon the countywide model from the Alameda County Congestion Management Agency (ACCMA). The City of San Leandro model estimates traffic for 2003 and for 2025 in the a.m. and p.m. peak hours. It is a very detailed model and can accurately estimate trips for relatively small areas such as the Costco store north of Davis Street. TJKM has demonstrated that this model provides accurate traffic estimates for traffic on Davis Street at Doolittle Drive in terms of total entering traffic, and also right and left turns in both peak hours. The City of San Leandro has determined that existing and future traffic congestion at Davis Street and Doolittle Drive requires traffic improvements that will cost approximately $1,000,000 including design, right of way and construction. Those improvements include widening the eastbound Davis Street approach with an additional lane, adding one additional westbound lane on Davis Street, and adding one additional northbound through lane on Doolittle Drive with corresponding changes in signal hardware and operation. These improvements are anticipated to be sufficient for forecast traffic demand through 2025. TJKM has used the traffic model to trace the origins and destinations of all a.m. and p.m. peak hour traffic using Davis and Doolittle. This has allowed the calculation of the proportion of traffic growth generated in the nearby area to all additional traffic using the intersection between 2003 and 2025. We have also been able to determine, on a square foot basis, the amount of traffic added by new development in the proposed assessment area, shown as Figure 1 on the next page. One zone, the Oakland Airport is only referenced and not shown on the map. The City of San Leandro currently charges a traffic impact fee, the "Development Fees for Street Improvements" (DFSI) for all net or additional development throughout the city. The basis for this fee is that while one particular development cannot be shown to contribute traffic at widespread locations throughout the city, the cumulative contribution of all increases in land use and development does increase traffic at many intersections and locations. An earlier study has identified projects and programs throughout the city that are justified on the basis of traffic growth. However, one specific intersection, Davis Street and Doolittle Drive, is singularly useful in serving growth in the proposed assessment area in Figure 1. This is because there are few alternate routes for Traffic other than to use Davis and Doolittle. The use of the model for 2003 and 2025 has enabled TJKM to calculate the specific traffic impact of increased land use intensity in this area. Summary There is a clear connection between anticipated increases in land use intensity in the proposed assessment area and increased trip making through Davis Street and Doolittle Drive. The routing of trips from the Oakland Airport via Doolittle Drive and Davis Street to reach I-880 is due to congestion on I-880. Bypassing congestion north of Davis Street (both north and southbound) via Doolittle Drive and Davis Street is faster than directly accessing I-880 from either 98"' Avenue or Hegenberger Drive.